While I don't do a lot of Cocoa-based programming (only about a month's worth), it was an interesting experience. There's a local UG that I haven't been able to attend since the TCLangUG meets on the same night, but that group has off in December, so I'm heading to the Cocoa UG tonight. Hopefully I can find someone who would be interested in giving an Objective-C talk at a future TCLangUG talk.